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Credit Facilities (Details) (USD $)
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1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | ||||||
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Dec. 31, 2012
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Sep. 30, 2013
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Sep. 30, 2013
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Dec. 31, 2012
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Nov. 30, 2011
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Oct. 29, 2010
Mowood LLC [Member]
Revolving note payable [Member]
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Nov. 30, 2011
Line of Credit [Member]
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Sep. 30, 2013
Line of Credit [Member]
Mowood LLC [Member]
Revolving note payable [Member]
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Oct. 29, 2011
Line of Credit [Member]
Mowood LLC [Member]
Revolving note payable [Member]
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Dec. 31, 2012
Non-Controlling Interest [Member]
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Sep. 30, 2013
Key Bank [Member]
Secured Debt [Member]
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Sep. 30, 2013
Key Bank [Member]
Secured Debt [Member]
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May 08, 2013
Key Bank [Member]
Secured Debt [Member]
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Dec. 20, 2012
Key Bank [Member]
Secured Debt [Member]
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| Line of Credit Facility [Line Items] | ||||||||||||||
| Line of Credit Facility, Covenant Terms | three years | |||||||||||||
| Contributions from noncontrolling interests | $ (30,000,000) | $ (30,000,000) | ||||||||||||
| Description of variable rate basis | LIBOR | LIBOR | LIBOR | |||||||||||
| Accrued interest on outstanding balance | 0.75% | 4.18% | 4.00% | 4.00% | 4.00% | 3.25% | ||||||||
| Debt Instrument, Interest Rate at Period End | 3.43% | 3.43% | ||||||||||||
| Line of Credit Facility, Periodic Payment, Principal | 292,000 | |||||||||||||
| Required principle payment as percentage of outstanding amount, beginning in year two | 0.42% | 0.42% | ||||||||||||
| Debt issuance cost | 1,100,000 | 1,500,000 | ||||||||||||
| Maximum borrowing base of revolving note payable | 10,000,000 | 1,300,000 | 20,000,000 | 70,000,000 | ||||||||||
| Outstanding principal and accrued interest payable, termination date | Oct. 29, 2013 | |||||||||||||
| Loan facility secured by assets | 10,000,000 | 1,300,000 | 20,000,000 | 70,000,000 | ||||||||||
| Expiration period | 180 days | |||||||||||||
| Commitment fee percentage | 0.25% | |||||||||||||
| Amortization of Financing Costs and Discounts | $ 129,000 | $ 385,000 | ||||||||||||
| debt instrument, description of prime rate basis | Prime Rate | |||||||||||||
| debt instrument, basis spread on prime rate | 2.75% | |||||||||||||